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学者姓名：曾薇
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摘要 ：
Conventional biological nutrient removal processes rely on external aeration and produce significant carbon dioxide (CO2) emissions. This study constructed a phototrophic simultaneous nitrification-denitrification phosphorus removal (P-SNDPR) system to treat low carbon to nitrogen (C/N) ratios wastewater and investigated the impact of sludge retention time (SRT) on nutrient removal performance, nitrogen conversion pathway, and microbial structure. Results showed that the P-SNDPR system at SRT of 15 days had the highest nutrient removal capacity, achieving over 85% and 98% removal of nitrogen and phosphorus, respectively, meanwhile maintaining minimal CO2 emissions. Nitrogen removal was mainly through assimilation at SRTs of 5 and 10 days, and nitrification-denitrification at SRTs of 15 and 20 days. Stable partial nitrification was facilitated by photoinhibition and low DO levels. Flow cytometry sorting technique results revealed SRT drove community structural changes in translational activity (BONCAT+) microbes, where BONCAT+ microbes were mainly simultaneous nitrogen and phosphorus removal bacteria (Candidatus Accumulibacter), denitrifying bacteria (Candidatus Competibacter and Plasticicumulans), ammonia-oxidizing bacteria (Nitrosomonas), and microalgae (Chlorella and Dictyosphaerium). The P-SNDPR system represents a novel, carbon-neutral process for efficient nutrient removal from low C/N ratio wastewater without aeration and external carbon source additions.
关键词 ：
sludge retention time sludge retention time flow cytometry sorting flow cytometry sorting microalgal-bacterial systems microalgal-bacterial systems translationactive translationactive low carbon to nitrogen ratio wastewater low carbon to nitrogen ratio wastewater
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| GB/T 7714 | Meng, Qingan , Zeng, Wei , Zhang, Jiayu et al. Combined Phototrophic Simultaneous Nitrification-Endogenous Denitrification with Phosphorus Removal (P-SNDPR) System Treating Low Carbon to Nitrogen Ratio Wastewater for Potential Carbon Neutrality [J]. | ENVIRONMENTAL SCIENCE & TECHNOLOGY , 2024 , 58 (6) : 2902-2911 . |
| MLA | Meng, Qingan et al. "Combined Phototrophic Simultaneous Nitrification-Endogenous Denitrification with Phosphorus Removal (P-SNDPR) System Treating Low Carbon to Nitrogen Ratio Wastewater for Potential Carbon Neutrality" . | ENVIRONMENTAL SCIENCE & TECHNOLOGY 58 . 6 (2024) : 2902-2911 . |
| APA | Meng, Qingan , Zeng, Wei , Zhang, Jiayu , Liu, Hongjun , Li, Shuangshuang , Peng, Yongzhen . Combined Phototrophic Simultaneous Nitrification-Endogenous Denitrification with Phosphorus Removal (P-SNDPR) System Treating Low Carbon to Nitrogen Ratio Wastewater for Potential Carbon Neutrality . | ENVIRONMENTAL SCIENCE & TECHNOLOGY , 2024 , 58 (6) , 2902-2911 . |
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摘要 ：
Feammox (Fe(III) reduction coupled with anaerobic ammonium oxidation) is less studied for nitrogen removal in wastewater treatment, and the limited studies show its low removal efficiency and need for continuous resupply of Fe(III) sources. In this study, sustainable and efficient nitrogen removal was obtained by the Fe redox cycle with only 1 g/L Fe2O3 dosage. The removal efficiencies of NH4+-N and TN were 100% and 92.45%, respectively, significantly higher than previous studies (similar to 50%). Fe(III) was reduced to Fe(II) by Feammox and subsequently regenerated by NDFO (NOx--N-dependent Fe(II) oxidation) and chemical oxidization. NOx--N produced by Feammox was also reduced to N-2 by NDFO. The iron-reducing bacteria (Ferruginibacter and Dechloromonas) and the iron-oxidizing bacteria (Rhodanobacter and Thermomonas) were enriched by the addition of Fe2O3 and played important roles in Feammox and NDFO, respectively. Results of X-ray diffraction showed that Fe(OH)(2) was produced from Feammox and then transformed to lepidocrocite by Fe(II) oxidation. Metagenomic analysis showed D/ANRA (dissimilatory/ assimilatory nitrate reduction to ammonia) were the potential nitrogen conversion pathways. N2O as an intermediate product of Feammox or NDFO was undetected. The genes associated with Fe transport were upregulated, accelerating the transfer of electrons between microorganisms and Fe(Hydr)oxide. The process for nitrogen removal by the Fe redox cycle requires no aeration and no organic carbon source, and can reduce the need for Fe(III) sources. It offers a promising method for nitrogen removal from wastewater.
关键词 ：
Fe redox cycle Fe redox cycle NDFO NDFO Nitrogen removal Nitrogen removal Feammox Feammox Metagenomic Metagenomic
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| GB/T 7714 | Hao, Xiaojing , Zeng, Wei , Li, Jianmin et al. High-efficient nitrogen removal with low demand of Fe source and mechanism analysis driven by Fe(II)/Fe(III) cycle [J]. | CHEMICAL ENGINEERING JOURNAL , 2024 , 481 . |
| MLA | Hao, Xiaojing et al. "High-efficient nitrogen removal with low demand of Fe source and mechanism analysis driven by Fe(II)/Fe(III) cycle" . | CHEMICAL ENGINEERING JOURNAL 481 (2024) . |
| APA | Hao, Xiaojing , Zeng, Wei , Li, Jianmin , Zhan, Mengjia , Miao, Haohao , Gong, Qingteng . High-efficient nitrogen removal with low demand of Fe source and mechanism analysis driven by Fe(II)/Fe(III) cycle . | CHEMICAL ENGINEERING JOURNAL , 2024 , 481 . |
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摘要 ：
The nitrate and phosphate removal in sulfur based (Vp) and sulfur-iron based autotrophic denitrification systems (Sp) with sponge iron as the iron source was investigated under different pH (6-9). In this study, Sp (>98 %) and Vp (>97 %) had higher nitrate removal efficiency at pH 7-8 and the highest phosphate removal efficiency (94.9 % +/- 3.57 %) at pH 6. The flow cytometry detection revealed that the cell integrity was damaged due to the formation of iron crusts at pH 6, which resulted in irreversible inhibition in Sp. Electron transfer and nitrogen transformation showed that compared with the sustained inhibition of denitrification at pH 6, the inhibition at pH 9 occurred mainly in the initial 0-2 h due to the enhanced flow of electrons toward the formation of biological element sulfur (S0bio). Coupled sponge iron promoted the adsorption and reduction of NO2- /N2O and reduced N2O emissions. Metatranscriptomics analysis showed that significant upregulation of key gene expression for nitrogen and sulfur metabolism in Sp, with complex regulatory mechanisms enhancing system stability and performance. Acidic conditions reduced the abundance of denitrification and sulfur oxidation functional genes. However, alkaline conditions (pH of 9) mainly caused the decreased abundance of denitrification functional genes, which was favorable for accumulation of S0bio. This study provides a theoretical basis for the stable operation and regulation of the sulfur-iron based autotrophic denitrification process.
关键词 ：
Sulfur-iron based autotrophic denitrification Sulfur-iron based autotrophic denitrification Acidic and Alkaline Acidic and Alkaline Metatranscriptome Metatranscriptome biofilter biofilter Nitrogen and sulfur conversions Nitrogen and sulfur conversions Functional gene Functional gene
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| GB/T 7714 | Miao, Haohao , Zeng, Wei , Li, Jianmin et al. Nutrient removal performance and the nitrogen-sulfur conversion pathways in sulfur-iron based biofilter under acidic/alkaline conditions [J]. | CHEMICAL ENGINEERING JOURNAL , 2024 , 499 . |
| MLA | Miao, Haohao et al. "Nutrient removal performance and the nitrogen-sulfur conversion pathways in sulfur-iron based biofilter under acidic/alkaline conditions" . | CHEMICAL ENGINEERING JOURNAL 499 (2024) . |
| APA | Miao, Haohao , Zeng, Wei , Li, Jianmin , Meng, Qingan , Zhan, Mengjia , Hao, Xiaojing . Nutrient removal performance and the nitrogen-sulfur conversion pathways in sulfur-iron based biofilter under acidic/alkaline conditions . | CHEMICAL ENGINEERING JOURNAL , 2024 , 499 . |
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摘要 ：
Nitrite as an important substrate for Anammox can be provided by partial denitrification (PD). In this study, endogenous partial denitrification (EdPD) and exogenous partial denitrification (ExPD) sludge were domesticated and their nitrite transformation rate reached 74.4% and 83.4%, respectively. The impact of four carbon/ nitrogen (C/N) ratios (1.5, 3.0, 5.0 and 6.0) on nitrous oxide (N2O) emission and denitrification functional genes expression in both PD systems were investigated. Results showed that elevated C/N ratios enhanced most denitrification genes expression, but in EdPD, high nitrite levels suppressed nosZ genes expression (from 9.4% to 1.4%), leading to increased N2O emission (0 to 3.4%). EdPD also exhibited lower electron transfer system activity, resulting in slower nitrogen oxide conversion efficiency and more stable nitrite accumulation compared to ExPD. These findings offer insights for optimizing PD systems under varying water quality conditions.
关键词 ：
Denitrification gene expression Denitrification gene expression Nitrous oxide emission Nitrous oxide emission Nitrite accumulation Nitrite accumulation Energy supply rate Energy supply rate
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| GB/T 7714 | Wu, Hongan , Zeng, Wei , Wu, Lei et al. Mechanisms of endogenous and exogenous partial denitrification in response to different carbon/nitrogen ratios: Transcript levels, nitrous oxide production, electron transport [J]. | BIORESOURCE TECHNOLOGY , 2024 , 399 . |
| MLA | Wu, Hongan et al. "Mechanisms of endogenous and exogenous partial denitrification in response to different carbon/nitrogen ratios: Transcript levels, nitrous oxide production, electron transport" . | BIORESOURCE TECHNOLOGY 399 (2024) . |
| APA | Wu, Hongan , Zeng, Wei , Wu, Lei , Lu, Sijia , Peng, Yongzhen . Mechanisms of endogenous and exogenous partial denitrification in response to different carbon/nitrogen ratios: Transcript levels, nitrous oxide production, electron transport . | BIORESOURCE TECHNOLOGY , 2024 , 399 . |
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摘要 ：
Additional organics are generally supplemented in the sulfide-driven autotrophic denitrification system to accelerate the denitrification rate and reduce sulfate production. In this study, different concentrations of sodium acetate (NaAc) were added to the sulfide-driven autotrophic denitrification reactor, and the S0 accumulation increased from 7.8% to 100% over a 120-day operation period. Batch experiments revealed a threefold increase in total nitrogen (TN) removal rate at an Ac- -C/N ratio of 2.8 compared to a ratio of 0.5. Addition of organic carbon accelerated denitrification rate and nitrite consumption, which shortened the emission time of N2O, but increased the N2O production rate. The lowest N2O emissions were achieved at the Ac- -C/N ratio of 1.3. Stable isotope fractionation is a powerful tool for evaluating different reaction pathways, with the 18 epsilon/15 epsilon values in nitrate reduction ranging from 0.5 to 1.0. This study further confirmed that isotope fractionation can reveal denitrifying nutrient types, with the 18 epsilon (isotopic enrichment factor of oxygen)/15 epsilon (isotopic enrichment factor of nitrogen) value approaching 1.0 for autotrophic denitrification and 0.5 for heterotrophic denitrification. Additionally, the 18 epsilon/15 epsilon values can indicate changes in nitrate reductase. There is a positive correlation between the 18 epsilon/15 epsilon values and the abundance of the functional gene napA, and a negative correlation with the abundance of the gene narG. Moreover, 18 epsilon and 15 epsilon were associated with changes in kinetic parameters during nitrate reduction. In summary, the combination of functional gene analysis and isotope fractionation effectively revealed the complexities of mixotrophic denitrification systems, providing insights for optimizing denitrification processes.
关键词 ：
Nitrous oxide Nitrous oxide Denitrification desulfurization system Denitrification desulfurization system Functional gene Functional gene Heterotrophic denitrification Heterotrophic denitrification Isotope effect Isotope effect
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| GB/T 7714 | Zhan, Mengjia , Zeng, Wei , Wu, Congcong et al. Impact of organic carbon on sulfide-driven autotrophic denitrification: Insights from isotope fractionation and functional genes [J]. | WATER RESEARCH , 2024 , 255 . |
| MLA | Zhan, Mengjia et al. "Impact of organic carbon on sulfide-driven autotrophic denitrification: Insights from isotope fractionation and functional genes" . | WATER RESEARCH 255 (2024) . |
| APA | Zhan, Mengjia , Zeng, Wei , Wu, Congcong , Chen, Gangxin , Meng, Qingan , Hao, Xiaojing et al. Impact of organic carbon on sulfide-driven autotrophic denitrification: Insights from isotope fractionation and functional genes . | WATER RESEARCH , 2024 , 255 . |
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摘要 ：
This study developed a two -stage process, including Tetrasphaera-dominated enhanced biological phosphorusremoval (EBPR(T)) sequencing batch reactor (SBR), followed by sulfur autotrophic denitrification (SADN) SBR, to achieve advanced nutrients removal from low VFAs wastewater. The removal efficiencies of nitrogen and phosphorus (PO43--P) reached 99 % with effluent PO43--P and total inorganic nitrogen (TIN) below 0.5 mg/L and 1 mg/L in EBPR(T) and SADN SBR, respectively. Mechanism analysis indicated that as increasing drainage ratio and complex carbon sources, free amino acids, glycogen, and PHA served as the endogenous carbon sources of Tetrasphaera to store energy. SADN contributed to approximately 80 % of nitrogen removal. DNA and cDNA results indicated Tetrasphaera was shifted from clade 2 to clade 1 after increasing the drainage ratio and the complexity of the carbon source, and Tetrasphaera (50.95 %) and Ca. Accumulibacter (9.12 %) were the most important functional microorganisms synergized to remove phosphorus at the transcriptional level in EBPR(T). Thiobacillus (45.97 %) and Sulfuritalea (9.24 %) were the dominant sulfur autotrophic denitrifiers at gene and transcriptional level in SADN. The results suggested that the EBPR(T) - SADN SBRs have great nutrient removal performance in treating low VFAs wastewater without additional carbon sources.
关键词 ：
Transcription level Transcription level Enhanced biological phosphorus-removal (EBPR) Enhanced biological phosphorus-removal (EBPR) Tetrasphaera Tetrasphaera Sulfur autotrophic denitrification (SADN) Sulfur autotrophic denitrification (SADN) Low VFAs wastewater Low VFAs wastewater
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| GB/T 7714 | Liu, Hongjun , Zeng, Wei , Meng, Qingan et al. An integrated system combining Tetrasphaera-dominated enhanced biological phosphorus removal with sulfur autotrophic denitrification to enhance biological nutrients removal [J]. | SCIENCE OF THE TOTAL ENVIRONMENT , 2024 , 915 . |
| MLA | Liu, Hongjun et al. "An integrated system combining Tetrasphaera-dominated enhanced biological phosphorus removal with sulfur autotrophic denitrification to enhance biological nutrients removal" . | SCIENCE OF THE TOTAL ENVIRONMENT 915 (2024) . |
| APA | Liu, Hongjun , Zeng, Wei , Meng, Qingan , Zhang, Jiayu , Peng, Yongzhen . An integrated system combining Tetrasphaera-dominated enhanced biological phosphorus removal with sulfur autotrophic denitrification to enhance biological nutrients removal . | SCIENCE OF THE TOTAL ENVIRONMENT , 2024 , 915 . |
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摘要 ：
A novel mixotrophic denitrification biofilter for nitrate removal using polycaprolactone and thiosulfate (MD-PT) as electron donors was investigated. MD-PT achieved high nitrate removal efficiency of approximately 99.8 %. The nitrate removal rates of MD-PT reached 1820 g N/m3/d, which was 304 g N/m3/d higher than that of autotrophic denitrification biofilter using thiosulfate (AD-T). Autotrophic and heterotrophic denitrification pathways in MD-PT were responsible for 67.6-94.5 % and 4.7-32.4 % of the nitrate removal, respectively. The production of SO4 2- in MD-PT was lower than that in AD-T, and the effluent pH was maintained at approximately 7.3 without acid-base neutralization. The abundance of key genes involved in carbon, nitrogen, and sulfur transformation was enhanced, which improved the nitrate removal of MD-PT. Alicycliphilus and Simplicispira related to organic compounds degradation were enriched after the addition of polycaprolactone. This research provided new insights into mixotrophic denitrification systems.
关键词 ：
Thiosulfate Thiosulfate Nitrate removal Nitrate removal Genes expression Genes expression Solid carbon source Solid carbon source
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| GB/T 7714 | Wang, Ruikang , Zeng, Wei , Miao, Haohao et al. Novel mixotrophic denitrification biofilter for efficient nitrate removal using dual electron donors of polycaprolactone and thiosulfate [J]. | BIORESOURCE TECHNOLOGY , 2024 , 417 . |
| MLA | Wang, Ruikang et al. "Novel mixotrophic denitrification biofilter for efficient nitrate removal using dual electron donors of polycaprolactone and thiosulfate" . | BIORESOURCE TECHNOLOGY 417 (2024) . |
| APA | Wang, Ruikang , Zeng, Wei , Miao, Haohao , Gong, Qingteng , Peng, Yongzhen . Novel mixotrophic denitrification biofilter for efficient nitrate removal using dual electron donors of polycaprolactone and thiosulfate . | BIORESOURCE TECHNOLOGY , 2024 , 417 . |
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摘要 ：
The significance of inorganic carbon (IC) for anaerobic ammonium oxidation (anammox) bacteria has been verified. However, the regulation of metabolic pathways under IC stress is not clear, limiting the optimization of IC supply. In this study, the regulatory pathways at IC concentration of 5-150 mg/L were explored to achieve optimal control of IC. The results show that the changes of metabolic pathway under IC stress determined anammox characteristics. At IC concentration of 5 mg/L, the anammox activity distinctly decreased due to the guanosine tetraphosphate (ppGpp) -mediated regulation under IC limitation. With less than 15 mg/L of IC, the decrease of carbon fixation limited the biosynthesis of gluconeogenesis and amino acids, causing the decline of extracellular polymeric substance synthesis. With more than 50 mg/L of IC, the improvement of purine and pyrimidine metabolism enhanced the electron transport capacity and growth potential of anammox bacteria. This study provides metabolic insights into IC influence on anammox consortia and a novel method of IC concentration optimization using metabolomics analysis.
关键词 ：
Metabolomics Metabolomics Inorganic carbon Inorganic carbon Anaerobic ammonium oxidation Anaerobic ammonium oxidation Extracellular polymeric substance (EPS) Extracellular polymeric substance (EPS)
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| GB/T 7714 | Ma, Chenyang , Zeng, Wei , Li, Jianmin et al. Metabolomic pathway regulation to achieve optimal control of inorganic carbon in anammox process [J]. | SCIENCE OF THE TOTAL ENVIRONMENT , 2023 , 855 . |
| MLA | Ma, Chenyang et al. "Metabolomic pathway regulation to achieve optimal control of inorganic carbon in anammox process" . | SCIENCE OF THE TOTAL ENVIRONMENT 855 (2023) . |
| APA | Ma, Chenyang , Zeng, Wei , Li, Jianmin , Meng, Qingan , Peng, Yongzhen . Metabolomic pathway regulation to achieve optimal control of inorganic carbon in anammox process . | SCIENCE OF THE TOTAL ENVIRONMENT , 2023 , 855 . |
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摘要 ：
一种检测活性污泥系统中活性功能菌的方法，属于污水生物处理技术领域。本发明利用改良的生物正交氨基酸标记染色法联合流式细胞仪分选技术和测序技术对污水处理系统中功能活性微生物的种群占比。通过改良的生物正交氨基酸标记染色法对活性功能菌进行特异性染色，在利用流式细胞仪识别并分选出活性功能细菌种群；分选后的细菌进行预处理后，根据改良的微量DNA试剂盒对样品进行预处理，进而利用苯酚抽提法提取DNA，并对提取后的DNA进行16SrRNA高通量测序；根据分选前和分选后的高通量测序结果进行比对，得出活性功能菌的种群丰度。本发明提供了一种经济、简便、可靠的污水处理系统活性污泥中活性功能菌的定量方法。
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| GB/T 7714 | 曾薇 , 孟庆安 , 刘宏军 . 一种检测活性污泥系统中活性功能菌的方法 : CN202310608738.5[P]. | 2023-05-29 . |
| MLA | 曾薇 et al. "一种检测活性污泥系统中活性功能菌的方法" : CN202310608738.5. | 2023-05-29 . |
| APA | 曾薇 , 孟庆安 , 刘宏军 . 一种检测活性污泥系统中活性功能菌的方法 : CN202310608738.5. | 2023-05-29 . |
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摘要 ：
一种生物正交氨基酸标记染色法联合荧光原位杂交检测活性污泥系统中活性聚磷菌的方法，属于污水生物处理技术领域。本发明使用L‑高炔丙基甘氨酸培养活性污泥中微生物，并通过生物正交氨基酸标记染色法对利用该氨基酸合成蛋白质的微生物进行荧光染色；采用荧光原位杂交技术使探针PAO846、PAO651、PAO462与荧光染色后的样品中聚磷菌目的基因进行杂交；利用流式细胞仪检测被荧光标记的细菌，通过圈门处理识别出活性聚磷菌区域，进而计算和分析活性聚磷菌占全菌的比例。本发明提供了一种经济、简便、可靠的污水处理系统活性污泥中活性聚磷菌的定量方法，为实际污水处理厂调控生物除磷条件提供了理论依据。
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| GB/T 7714 | 曾薇 , 孟庆安 , 刘宏军 et al. 一种生物正交氨基酸标记染色法联合荧光原位杂交技术检测活性污泥系统中活性聚磷菌的方法 : CN202310164818.6[P]. | 2023-02-26 . |
| MLA | 曾薇 et al. "一种生物正交氨基酸标记染色法联合荧光原位杂交技术检测活性污泥系统中活性聚磷菌的方法" : CN202310164818.6. | 2023-02-26 . |
| APA | 曾薇 , 孟庆安 , 刘宏军 , 彭永臻 . 一种生物正交氨基酸标记染色法联合荧光原位杂交技术检测活性污泥系统中活性聚磷菌的方法 : CN202310164818.6. | 2023-02-26 . |
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